@basedbagel I have a co-worker who I think has gotten a booster every opportunity there is one to get one. He is not dead yet, and does not appear to be on death's door. Maybe there is a certain gene that makes you more susceptible to the vaxx issues, but we will never know because "the experts" have no desire to look into it.
Maybe people like your parents and my co-worker are those who do not have this gene. But we cannot know for sure.